Microstructure and oxidation behaviour of Ir-rich Ir-Al binary alloys

Z. B. Bao; H. Murakami; Y. Yamabe-Mitarai

doi:10.1016/j.corsci.2014.06.038

Microstructure and oxidation behaviour of Ir-rich Ir-Al binary alloys

Z. B. Bao^*, H. Murakami, Y. Yamabe-Mitarai

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

In the current study, alloys of Ir-11Al, Ir-23Al, Ir-30Al, Ir-41Al and Ir-45Al (at.%) were prepared to investigate the microstructure and oxidation behaviour of Ir-rich Ir-Al alloys. Ir(Al)_ss and/or β-IrAl intermetallic phases were found to exist in the prepared alloys. During isothermal oxidation at 1100°C, the Ir(Al)_ss and β-IrAl individually changed to porous and dense Al₂O₃. The microstructure of the oxide scale formed on Ir-23Al was similar to that of its former alloy which possessed a dendrite-like configuration. It was found that the mass change of Ir-45Al followed a parabolic law, showing the best oxidation resistance among the Ir-Al alloys.

Original language	English
Pages (from-to)	306-311
Number of pages	6
Journal	Corrosion Science
Volume	87
DOIs	https://doi.org/10.1016/j.corsci.2014.06.038
Publication status	Published - 2014 Oct
Externally published	Yes

Keywords

A. Alloy
B. SEM
B. Weight loss
C. High temperature corrosion
C. Oxidation

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Materials Science(all)

Access to Document

10.1016/j.corsci.2014.06.038

Cite this

@article{3ad1703fbe35457e84630f74e6c25a91,

title = "Microstructure and oxidation behaviour of Ir-rich Ir-Al binary alloys",

abstract = "In the current study, alloys of Ir-11Al, Ir-23Al, Ir-30Al, Ir-41Al and Ir-45Al (at.%) were prepared to investigate the microstructure and oxidation behaviour of Ir-rich Ir-Al alloys. Ir(Al)ss and/or β-IrAl intermetallic phases were found to exist in the prepared alloys. During isothermal oxidation at 1100°C, the Ir(Al)ss and β-IrAl individually changed to porous and dense Al2O3. The microstructure of the oxide scale formed on Ir-23Al was similar to that of its former alloy which possessed a dendrite-like configuration. It was found that the mass change of Ir-45Al followed a parabolic law, showing the best oxidation resistance among the Ir-Al alloys.",

keywords = "A. Alloy, B. SEM, B. Weight loss, C. High temperature corrosion, C. Oxidation",

author = "Bao, {Z. B.} and H. Murakami and Y. Yamabe-Mitarai",

year = "2014",

month = oct,

doi = "10.1016/j.corsci.2014.06.038",

language = "English",

volume = "87",

pages = "306--311",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Microstructure and oxidation behaviour of Ir-rich Ir-Al binary alloys

AU - Bao, Z. B.

AU - Murakami, H.

AU - Yamabe-Mitarai, Y.

PY - 2014/10

Y1 - 2014/10

N2 - In the current study, alloys of Ir-11Al, Ir-23Al, Ir-30Al, Ir-41Al and Ir-45Al (at.%) were prepared to investigate the microstructure and oxidation behaviour of Ir-rich Ir-Al alloys. Ir(Al)ss and/or β-IrAl intermetallic phases were found to exist in the prepared alloys. During isothermal oxidation at 1100°C, the Ir(Al)ss and β-IrAl individually changed to porous and dense Al2O3. The microstructure of the oxide scale formed on Ir-23Al was similar to that of its former alloy which possessed a dendrite-like configuration. It was found that the mass change of Ir-45Al followed a parabolic law, showing the best oxidation resistance among the Ir-Al alloys.

AB - In the current study, alloys of Ir-11Al, Ir-23Al, Ir-30Al, Ir-41Al and Ir-45Al (at.%) were prepared to investigate the microstructure and oxidation behaviour of Ir-rich Ir-Al alloys. Ir(Al)ss and/or β-IrAl intermetallic phases were found to exist in the prepared alloys. During isothermal oxidation at 1100°C, the Ir(Al)ss and β-IrAl individually changed to porous and dense Al2O3. The microstructure of the oxide scale formed on Ir-23Al was similar to that of its former alloy which possessed a dendrite-like configuration. It was found that the mass change of Ir-45Al followed a parabolic law, showing the best oxidation resistance among the Ir-Al alloys.

KW - A. Alloy

KW - B. SEM

KW - B. Weight loss

KW - C. High temperature corrosion

KW - C. Oxidation

UR - http://www.scopus.com/inward/record.url?scp=84922221345&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84922221345&partnerID=8YFLogxK

U2 - 10.1016/j.corsci.2014.06.038

DO - 10.1016/j.corsci.2014.06.038

M3 - Article

AN - SCOPUS:84922221345

SN - 0010-938X

VL - 87

SP - 306

EP - 311

JO - Corrosion Science

JF - Corrosion Science

ER -

Microstructure and oxidation behaviour of Ir-rich Ir-Al binary alloys

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this